Waking up changed into a beautiful lady may be the stuff of some men' fantasies, but when the abruptly effeminatized Natsuru is informed by a stuffed tiger that he's now a Kampfer, a supernatural warrior who has to combat other Kampfers in female form, his life turns into a living nightmare! Aside from the obvious "plumbing" concerns, Natsuru's best childhood buddy turns out to be on the other side of the coin, and SHE has a crush on his new female form. Is it not complicated enough? Natsuru's school includes distinct divisions for boys and girls, therefore he and she are now enrolled in both classes. According to rumors, he's dating himself. And there are other Kampfers at the school who want to take her out, but he doesn't know which ones.